Broan 508 - 270 CFM 6 Sones Utility Fan

The BROAN 508 Through Wall Ventilation Fan, featuring a specially designed polymeric fan blade, can efficiently remove smoke and humidity from the room. The fan is housed in a stylish white square plastic grille that can be installed on walls 4-1/2" to 9-1/2" thick. This 6.0 sones exhaust fan offers 270 CFM of airflow capacity and has a built-in damper to reduce back drafts.